Participants report first sightings (or bird calls) of 10 indicators. These include the first swallows, cuckoo, cowslips, hazel catkins, ladybirds (the 7 point variety), oak buds, vine shoots, yellow butterfly, pyramid orchids and green frogs.
Not all of these appear early in the spring, but it is useful to mark the progress of the season as it seems to be getting earlier each year.
Cowslips: primavere coucou |
This link is to the very interesting report on the activities of the Sentinels in 2018.
http://www.midi-quercy.fr/IMG/pdf/-14.pdf